[Bug c/108310] Some warnings that -Wtraditional-conversion causes to be emitted aren't actually controlled by it

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108310

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
void f(float);

void g()
{
  f(1.0);
}

conv.c: In function ‘g’:
conv.c:5:5: warning: passing argument 1 of ‘f’ as ‘float’ rather than ‘double’
due to prototype
    5 |   f(1.0);
      |     ^~~